Kirby and the Amazing Mirror
There is a Mirror World that exists in the skies of Dream Land. It is a world where any wish reflected in the mirror will come true. However, one day it only copies evil minds, and rapidly changes into a world of evil. Meta Knight notices this, and flies up to save the Mirror World.
Meanwhile, Kirby is taking a walk, when Dark Meta Knight appears. But before Kirby can react, Dark Meta Knight slices Kirby in four and Kirby becomes four different colored "Kirbys". Kirby travels alone, but if his cell phone is working, he can call his friends and they will help him. They chase after the Dark Meta Knight and enter the Mirror World.
The two Meta Knights fight each other and the real Meta Knight is defeated. He is knocked into the mirror, which is then broken into eight fragments. Kirby must save the Mirror World.